Name: 1. The nucleus is the part of the atom that
A consist mostly of empty space
B.
has a negative charge
Coccupies most of the atom's total volume
D. contains most of the atom's total mass

D.

Explanation:

There are three types of particles within atoms: protons, neutrons, and electrons.

Electrons have essentially no mass and orbit the nucleus in various energy levels.

Protons and neutrons have mass and are both found within the nucleus of the atom.

what is the general relationship between a galaxy's distance from earth and its speed?

the answer is:

the farther away a galaxy is from us, the faster it is moving away from us.

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.